S2 Hypothesis TestingAn hypothesis is a statement made about the value of a population parameter that we wish to test by collecting evidence in the form of a sample.In a statistical hypothesis test the evidence comes from a sample which is summarized in the form of a statistic called the test statistic.

We form two Hypotheses:
- The null hypothesis,H0, we assume to be correct unless proven otherwise.
-The alternative hypothesis,H1,tells us about the population parameter if our assumption is shown to be wrong.

The critical region is the range of values that lead to a rejection of the null hypothesis.One tailed test-looks for an increase or decrease in the value.Two tailed test.Two critical valuesAlternative hypothesis…